title: 2-Bromo-1,6,6-trimethyl-6,7,8,9-tetra-hydro-phenanthro[1,2-b]furan-10,11-dione.
abstract: In the title compound, C19H17BrO3, the ring skeleton is located on a crystallographic mirror plane; two C atoms of the cyclo-hexene ring are disordered over the two locations to satisfy the preferred ring conformation. In the crystal, C-H⋯O hydrogen bonds link the mol-ecules into chains along the a axis. π-π stacking inter-actions between benzo-quinone rings, with a centroid-centroid distance of 3.7225 (4) Å, are also observed, which connect the chains into a two-dimensional networkparallel to the ab plane.
authors.affiliation: Chemical Engineering & Pharmaceutics College, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China ; College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471022, People's Republic of China.
authors.forename: Cui-Ping
authors.initials: CP
authors.lastname: Fan
authors.forename: Wei-Ping
authors.initials: WP
authors.lastname: Yin
authors.forename: Xin-Xiang
authors.initials: XX
authors.lastname: Cao
authors.forename: Jing-Cai
authors.initials: JC
authors.lastname: Yao